Ventilator



Jan. 21; 1930. R KELLEY 1,744,476

VENTILATOR 6 Filed March 24, 1927 !NVENTOR Frank R.Kel)g by 7% his mfwney Patented Jan. 21, 1930 UNITED STATES PATENT OFFICE VENTILATOR AppIication filed March 24, 1927. Serial No. 177,858.

This invention relates to an induction ventilator, and particularly to an induction ventilator for use in conjunction with an exhausting ventilator.

In chicken houses, stables, barns, and the like, it has been found that natural ventilation obtained by the use of ordinary outlet ventilators is insufficient. This is particularly true in buildings where the live stock require a relatively quick change or renewal of air. In order to assist the ventilators as now used in exhausting the foul air, a novel intake ventilator has been designed. By use of an induction ventilator the incoming air may be heated and directed as desired, and in addition the windows and other openings may be closed during stormy weather and dry air is admitted to the interior of the building.

The object of the invention is to provide an intake ventilator which is so constructed that it will not permit the entrance of rain or snow into the ventilator and the intake conduit with which it is associated.

Another object of the invention is to provide an intake ventilator which is of a simplified construction permitting increased facility in the manufacture of the ventilator.

In the accompanying drawings Figure 1 is a side elevation of the rotary intake ventilator of the present invention, showing the directing vane thereof broken away; Figure 2' is a front elevation of the same; Figure 3 is a vertical sectional view through the intake ventilator; and Figure 4 is a top plan view of the ventilator.

The intake ventilator is of a special construction designed to prevent the entrance of rain or snow when the ventilator is facing into the wind and also to provide an increased facility and economy in manufacture.

This intake ventilator comprises the side plates 16 and back and roof plate 17 and a front baffle plate 18. Throughout the lower body portion of the ventilator the side plates,

16 are substantially parallel, as are also the back and roof plate 17 and baffle plate 18. Part way of their vertical extent, however, the side plates 16 are flared first outwardly to a line 19 which constitutes the lower lip of the cowl 20, and are then led inwardly to a point 21 at the top of the cowl. The roof of the cowl 20 is formed by curving the back plate 17 so that it engages the side plates 16. As shown in Figure 4, the curved portion of this plate 17 also flares outwardly to the point 19, which represents the greatest extension of the side plates 16.

The baflle plate 18 forms the front wall of the ventilator, and extends vertically upward substantially to the point of line 19 representing both the greatest flaring of the side walls and cowl and the line of the lower lip of the cowl. By this arrangement air entering the ventilator impinges against the baffle plate 18 and enters the cowl through the open 22 which lies forwardly and upwardly of the baffle plate. Due to this impinging on the bafile plate 18, and due to sides 16 of the cowl, the kinetic energy of the wind due to. its velocity is transformed into potential or pressure energy at a line adjacent the upper edge of baflie plate 18; this provides an increase in ventilating effect. Because of the flaring of the sides 16 and cowl roof 17 in the plane represented by the line 19 the area' of this intake opening 22 is substantially equal to the throat area within the body por tion 23 of the ventilator. This arrangement permits a maximum intake of air, while preventing the entrance of rain or snow.

Because of the rectangular cross section of the lower body portion 23 of the ventilator,

a substantially cylindrical member 2 1 is mounted interiorly of the body portion, and is attached thereto by means of rivets and a flange 2d. This member 24 extends a slight distance into the conduit 1, and per mits the intake ventilator as a whole to be rotatably mounted on the conduit. The mounting means may comprise a spindle 25 which bears on its point in the socket 26 of the spider 27. The ventilator structure, as above described, is one providing great facility of manufacture, because the outer shell of the ventilator proper comprises only five members; the two side plates 16, the back and roof plate 17, and the baflle plate 18, and the directing vane 6. These members are rigidly interconnected, as by crimping them together at their edges, and the relatively 00 low member with a forwardly an Wardly projecting cowl, and a baflie plate disgreat number of parts usually utilized in a ventilator is thus reduced.

What I claim is:

1. An intake ventilator comprisin a holdownposed inwardly of the cowl and the sides of the hollow member, the ventilator being so rotatably mounted that the batlie member thereof constantly faces into the wind to maintain a static pressure betwen the bafile plate and cowl during periods of air flow, the side plates and the top plate being so flared that the area of the air entrance between the baflle plate and the cowl is at least equal to the internal area in the body of the ventilator.

2. An intake ventilator comprising a hollow member with a forwardly and downwardly projecting cowl, and abaflle plate disposed inwardly of the cowl and the sides of the hollow member, the ventilator being so rotatably mounted that the baflle member thereof constantly faces into the wind to maintain a static pressure between the battle plate and the cowl during periods of air flow, the side plates and the top plate being so flared that the intake area between the bafile plate, the sides of the hollow member and the edge of the cowl is of relatively great width with respect to its depth.

3. An intake ventilator comprising continuous plates providing sides for the body of the ventilator and for a cowl thereon, a continuous plate comprising a back for the ventilator body and a roof for the cowl, and a front bafile plate disposed inwardly of the cowl, the side plates and IuOf plate being so flared that the area of the air entrance between the baflle plate and the cowl is equal to the internal area in the body of the ventilator.

4. An intake ventilator comprising a hollow member having a forwardly and downwardly projecting cowl and an open space beneath the cowl, and a bafile plate disposed inwardly of the cowl and extending Vertical- 1y to approximately the horizontal plane of the lower edge thereof, the sides of the body member and the sides and the roof of the cowl diverging to points along a line formed by the lower edge of the cowl:

In witness whereof, I hereunto set my hand.

FRANK R. KELLEY. 

